The dollar limit on TSP investments will rise to $17,500 a year from $17,000 allowed this year, marking the second straight year for a $500 increase, according toThe Washington Post. Participants age 50 and older still will be allowed to make additional “catch-up” investments of $5,500.

Both traditional TSP and the new Roth option are combined when accounting for the dollar caps, which also apply to other 401(k) participants and similar employer-sponsored retirement plans.

An increasing number of TSP participants are choosing the new Roth option. The Federal Retirement Thrift Investment Board announced earlier this week that as of Sept. 30, a total of 51,354 federal employees had invested about $48.7 million into the Roth plan. The traditional TSP plan has about 4.5 million participants.

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